def fo(self):
    counts={}
    for word in self:
        counts[word]=counts.get(word,0)+1
    items=list(counts.items())
    for i in range(counts):
        word,count=items[i]
        if count>1:
            return True
        else:
            return False

lis=list(input("输入一组数据：").split(''))
fo(lis)
